Animal
Verified by an editor
Some humpback whale populations swim 5,000 miles between tropical breeding grounds and colder feeding grounds.
This animal fact generator shows one animal fact at a time, chosen at random from facts that have been checked against a named source. Press New fact for another. Every fact names its source and links to it.
The animal facts here come from organizations that study or look after the animals they describe. So far that means NOAA Fisheries for whales, turtles, seals and rays, the U.S. National Park Service for bison and pronghorn, the Smithsonian’s National Zoo for the cheetah, and the Natural History Museum in London for the octopus. It is why you will see measurements with units, and careful words such as “up to”, “about” and “may”. We keep those words because the source uses them. An animal fact without them is usually a tidier story than the animal itself.
How to use it
- Read the fact in the box at the top of the page. The line under it names the source and gives its tier, from A for a primary or official source down to D.
- Press New fact, or the Space bar, for another animal fact. The generator avoids showing you the same fact twice in a row.
- Press Read the explanation to open the fact’s own page. It has a short answer, about a hundred words of background, three related facts and the full source details.
- Use Copy, Share or Save to keep a fact or pass it on. Saved facts stay in your own browser.
If you would rather read than press a button, the Animal category page lists every animal fact we have published, newest first. For facts on every subject, use the main random fact generator.
A tip for teachers and quiz writers: a fact’s title usually turns into a question with very little work. “A Narwhal’s Tusk Is Actually a Tooth” becomes “What is a narwhal’s tusk made of?”, and the fact’s page gives you the answer and the source to show for it.
A real example
This is a fact as the generator shows it:
A Narwhal's Tusk Is Actually a Tooth
The tusk of a male narwhal is a tooth that grows out through the front of the jaw; it can reach 9.8 feet long.
A narwhal’s tusk looks like a horn, and the animal is often compared to a unicorn because of it. NOAA Fisheries, the source for this fact, describes it as a tooth that grows forward through the jaw of the male. Notice what the claim does not say. It does not say every narwhal has a tusk, because the source records females with tusks and males without as exceptions.
Three more animal facts, each with a different kind of record:
The Bison Is the Largest Land Mammal in North America
Bison are the largest land-dwelling mammals in North America; a male can weigh up to 2,000 pounds and still run 35 miles per hour.
Pronghorn Can Sprint at 45 to 50 Miles per Hour
Pronghorn can run sprints at 45 to 50 miles per hour, an adaptation to outrun a cheetah that is now extinct.
The Blue Whale Is the Largest Animal Ever to Live
Blue whales are the largest animals ever to live on Earth, reaching up to about 110 feet in length and up to 330,000 pounds in weight.
How these facts are verified
An editor reads the source page, writes the claim so that it says no more than the source does, and records the source and the date. Sizes, speeds and ages are copied with the source’s own units and qualifiers. If two sources disagree, the fact is held back or written around the part that is not in doubt. Our page How we verify facts explains the tiers and the process.
FactFusion AI uses AI assistance for content organization, explanation drafting, and classification. All facts are verified by human editors before publishing.
Add animal facts to your site
This code shows a random verified animal fact, with its source, on any web page. It is free to use. Please keep the link.
Questions and answers
Which animals are covered?
Whales, dolphins, seals, sea turtles, rays and a few land mammals so far, along with the octopus. The list grows as new facts are checked, so there is no fixed number.
Why are so many of the animals from the sea?
Many of our first animal facts were checked against NOAA Fisheries, which covers marine species. More land animals, birds and insects will be added as they are verified.
Are the sizes and speeds exact?
They are the figures the source gives, with the source’s own words such as “up to” or “about”. Individual animals vary, so treat them as the recorded range, not a promise.
What if I spot a mistake?
Open the fact’s page and use the “Report a problem with this fact” form. The editor checks the fact against its source again and corrects it if needed.